30th annual SSRL users’ meeting and workshops

Over the last 15 years, many 3^rd generation SR sources have been built throughout the world, either at energies of 1/2.5 or at 6 (ESRF, European Synchrotron Radiation Facility), 7 (APS, Advanced Photon Source), or 8 (SPring-8) GeV. These sources are characterized by a horizontal emittance in the range of 3–7 nm.rad with less than 1% coupling. With in-vacuum undulators, this kind of emittance enables the obtainment of brilliances between 10¹⁹–10²¹ph/s/mm²/mrad²/0.1% bw.     

5th International Conference on Spoken Language Processing(incorporating the 7th Australian Speech Science and Technology Conference)

TheICSLP'98ConferencewillcontinuetheeightyeartraditionoftheICSLPseriesinbringingtogetherprofessionalsfromallthediversedisciplinesthatcontributetoSpokenLanguageProcessing.Itwillbethepremierinternationaldisplayofthestate-ofthe-artinthisbroadfieldin1998.Theconferencewillbuildbridgesbetweenpeopleandsub-disciplinesinordertocreateandnurturesynergiesthatareimportantforthefutureofthefield.Keynotepresentationsandotherplenaryeventswhichbringbothexperienceandvisionofmulti-disciplinaryattacksongrand…     

CIOP 2015 The 7th International Conference on Information Optics and Photonics

<正>7/12-7/15 Nanjing,China Conference General Chairs:Prof.Zunqi Lin Member of Chinese Academy of Science.Shanghai Institute of Optics and Fine Mechanics,ChinaProf.shining zhu Member of Chinese Academy of Sciences:Nanjing University,China Prof.Eli Yablonovitch Member of the National Academy of Sciences and National Academy of Engineening:University of Califomia,Berkeley,USA     

Heisenberg Group and Energy-Momentum Conservative Law in de-Sitter Spaces In Memory of the 100th Anniversary of Einstein‘s Special Relativity and the 70th Anniversary of Dirac‘s de-Sitter Spaces and Their Boundaries

In 1935 Dirac established the physical wave equations in the de-Sitter spaces but neither energy-momentum operators nor their conservative laws were given. In this article it is proved that in the de-Sitter group there is a subgroup group isomorphic to the Heisenberg group and the generators of this groups are the energy-momentum operators which obey a conservative law.     

Analysis of th e $$Hb\bar b$$ coupling constant and CP-violation eff ects at th e futur e e+ e− collid er

The \(e^ + e^ - \to b\bar bv\bar v\) process, where υ is an electron, muon, or τ-lepton neutrino, is analyzed in detail for the general form of the coupling constant of a Higgs boson with b quarks, with the (m _b /v)(a+Iγ₅b) parameterization of the \(Hb\bar b\) interaction. This process is shown to be highly sensitive to this coupling constant. Experiments at the future with \(\sqrt s = 500 - GeV\) linear collider will provide limits of 2 and 20% for deviations of the parameters a and b, respectively, from their Standard Model values. Results concerning the \(e^ + e^ - \to b\bar bv\bar v\) process in combination with the independent measurements of the partial width \(\Gamma _{H \to b\bar b}\) can testify to the CP origin of the Higgs sector of the theory.     

CIOP 2015 The 7th International Conference on Information Optics and PhotonicsEI北大核心CSCD

7/12-7/15 Nanjing,China Conference General Chairs:Prof.Zunqi Lin Member of Chinese Academy of Science.Shanghai Institute of Optics and Fine Mechanics,ChinaProf.shining zhu Member of Chinese Academy of Sciences:Nanjing University,China Prof.Eli Yablonovitch Member of the National Academy of Sciences and National Academy of Engineening:University of Califomia,Berkeley,USA     

FIRST ANNOUNCEMENT AND CALL FOR PAPERS 6th Hungarian Seminar and Exhibition on Noise Control

The Department for Noise Control of the Optical,Acoustical and FilmtechnicalSociety,Budapest/Hungary-together with the——complex Commission of Acoustics of the Hungarian Academy of Sciences,——Special Committee for Vibration/Noise of the Scientific Cociety ofMechanical Engineers,——Committee for Environment Protection of the Society for TransportSciences and——Working Group for Building Physics of the Scientific Sociedty for Buildingwill organize in PECS on June 7—10,1989 with international participatdion the     

Characterisation of decorations on Iranian (10th–13th century) lustreware

It has been recently shown that lustre decoration of Medieval and Renaissance pottery consists of silver and copper nanoparticles, dispersed within the glassy matrix of the ceramic glaze. Lustre surfaces show peculiar optical effects, such as metallic reflection and iridescence. Here we report the findings of a study on lustred glazes of several shards belonging to Iranian pottery of the 10th and 13th centuries, decorated on both sides. Two different glazes, depending on the side of the sample, have been identified. Different lustre chromatic effects are characterised by the relative presence of silver- and copper-metal nanoparticles dispersed in the glassy matrix. PACS 61.46.+w     

Heisenberg Group and Energy-Momentum Conservative Law in de-Sitter Spaces—— In Memory of the 100th Anniversary of Einstein＇s Special Relativity and the 70th Anniversary of Dirac＇s de-Sitter Spaces

In 1935 Dirac established the physical wave equations in the de-Sitter spaces but neither energy-momentum operators nor their conservative laws were given. In this article it is proved that in the de-Sitter group there is a subgroup group isomorphic to the Heisenberg group and the generators of this groups are the energy-momentum operators which obey a conservative law.     

17~(th) International Workshop on ECR Ion Sources and Their Applications ECRIS 2006

Institute of ModernP饰sics，Chinese Aeademy of Seiences，Lanzhou，China SePtember 17一21，2006 Seielltifie Program Sund林y，SePt.17，Evening x.eet一肠gether Party 19:00.一21:oo凡eCePtion andwe一come Party(Znd Ploo:or Nin公v叭)z恤ang Hotel vIP Building) Mond尽y，SePt.18，Morning 11.opening s.sion(IMP Buildsng No.。，srd Floor，eonrerenee Ha一)‘、片了、.尹9:的一一9:10 9:10一9:50 (10min. (20min. opening Address一H.W.Zhao(IMP，Lanzhou，China) Welcome Address and Brief Introduet…     

Level density and radiative strength functions from (n th,2γ) reactions and basic properties of the 96Mo nucleus

Published data on the intensities of two-step cascades to 12 final-state levels of the ⁹⁶Mo nucleus are approximated by using a set of possible random dependences of the level density and radiative strength functions for primary E1 and M1 transitions. The average values of these parameters of gamma decay for any excitation energies and for gamma transitions agree well with basic dependences revealed to date from similar experiments for 42 nuclei in the mass-number range 40 ≤ A ≤ 200, but they are inconsistent with the generally accepted ideas of the parameters of the cascade gamma decay of compound states of nuclei having high level densities.     

Optimal N-Point Configurations on the Sphere: “Magic” Numbers and Smale’s 7th Problem

This paper inquires into the concavity of the map \(N\mapsto v_s(N)\) from the integers \(N\ge 2\) into the minimal average standardized Riesz pair-energies \(v_s(N)\) of \(N\) -point configurations on the sphere \(\mathbb {S}^2\) for various \(s\in \mathbb {R}\) . The standardized Riesz pair-energy of a pair of points on \(\mathbb {S}^2\) a chordal distance \(r\) apart is \(V_s(r)= s^{-1}\left( r^{-s}-1 \right) \) , \(s \ne 0\) , which becomes \(V_0(r) = \ln \frac{1}{r}\) in the limit \(s\rightarrow 0\) . Averaging it over the \(\left( \begin{array}{c} N\\ 2\end{array}\right) \) distinct pairs in a configuration and minimizing over all possible \(N\) -point configurations defines \(v_s(N)\) . It is known that \(N\mapsto v_s(N)\) is strictly increasing for each \(s\in \mathbb {R}\) , and for \(s<2\) also bounded above, thus “overall concave.” It is (easily) proved that \(N\mapsto v_{-2}^{}(N)\) is even locally strictly concave, and that so is the map \(2n\mapsto v_s(2n)\) for \(s<-2\) . By analyzing computer-experimental data of putatively minimal average Riesz pair-energies \(v_s^x(N)\) for \(s\in \{-1,0,1,2,3\}\) and \(N\in \{2,\ldots ,200\}\) , it is found that the map \(N\mapsto {v}_{-1}^x(N)\) is locally strictly concave, while \(N\mapsto {v}_s^x(N)\) is not always locally strictly concave for \(s\in \{0,1,2,3\}\) : concavity defects occur whenever \(N\in {\mathcal {C}}^{x}_+(s)\) (an \(s\) -specific empirical set of integers). It is found that the empirical map \(s\mapsto {\mathcal {C}}^{x}_+(s),\ s\in \{-2,-1,0,1,2,3\}\) , is set-theoretically increasing; moreover, the percentage of odd numbers in \({\mathcal {C}}^{x}_+(s),\ s\in \{0,1,2,3\}\) is found to increase with \(s\) . The integers in \({\mathcal {C}}^{x}_+(0)\) are few and far between, forming a curious sequence of numbers, reminiscent of the “magic numbers” in nuclear physics. It is conjectured that these new “magic numbers” are associated with optimally symmetric optimal-log-energy \(N\) -point configurations on \(\mathbb {S}^2\) . A list of interesting open problems is extracted from the empirical findings, and some rigorous first steps toward their solutions are presented. It is emphasized how concavity can assist in the solution to Smale’s \(7\) th Problem, which asks for an efficient algorithm to find near-optimal \(N\) -point configurations on \(\mathbb {S}^2\) and higher-dimensional spheres.     

A 6th order staggered compact finite difference method for the incompressible Navier–Stokes and scalar transport equations

In a previous paper we have developed a staggered compact finite difference method for the compressible Navier–Stokes equations. In this paper we will extend this method to the case of incompressible Navier–Stokes equations. In an incompressible flow conservation of mass is ensured by the well known pressure correction method  and . The advection and diffusion terms are discretized with 6th order spatial accuracy. The discrete Poisson equation, which has to be solved in the pressure correction step, has the same spatial accuracy as the advection and diffusion operators. The equations are integrated in time with a third order Adams–Bashforth method. Results are presented for a 1D advection–diffusion equation, a 2D lid driven cavity at a Reynolds number of 1000 and 10,000 and finally a 3D fully developed turbulent duct flow at a bulk Reynolds number of 5400. In all cases the methods show excellent agreement with analytical and other numerical and experimental work.     

Jovian electrons and the solar wind during the minimum of the 23rd–24th solar activity cycle

Jovian electrons in Earth orbit can be regarded as probes of the inner heliosphere’s structure. They readily penetrate into the inner heliosphere in periods of the optimum magnetic connection between Earth and Jupiter. Such a penetration is also occasionally observed at arbitrary Earth-Jupiter dispositions. This phenomenon can be explained by the occurrence of long-lived magnetic traps extending from the Sun to Jupiter and rotating along with the Sun.     

The 6th International Workshop on Zinc Oxide and Related Materials Aug.5～7,2010,Changchun,China First Announcement and Call for Papers

Dear Colleague:It is our great pleasure to announce that"The 6th International Workshop on Zinc Oxide and Related     

The 6th International Workshop on Zinc Oxide and Related Materials Aug.5～7,2010,Changchun,China First Announcement and Call for Papers

<正>Dear Colleague:It is our great pleasure to announce that "The 6th International Workshop on Zinc Oxide and Related Materials" (6th ZnO Workshop) will be held by The Key Laboratory of Excited State Processes,Changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,on August 5～7,2010 in Changchun,China.     

Acoustical News 14th International Congress on Acoustics

The 14th International Congress on Acoustics convened in Beijing,China from 3rdthrough 10th September 1992.About 750 participants from the five continents attendedthe Congress,a half of which were from China,including Taiwan.China was the hostcountry and a country with the largest population,therefore the largest group was cer-tainly from China.Because of the large number of papers,one third of the Chinese con-tributed papers were presented in the poster sessions.Among the total participants about150 were from Europe,100 from Japan,10 from the other countries in Asia,80 fromNorth America,20 from Australia and South America,and 2 from Africa.About 10 par-ticipants who had attended the 1st International Congress on Acoustics held in theNetherlands came to the Congress.The first congress was held 39 years ago.It is cele-brated that so many pioneers on acoustics have been persistently working in the subject.     

The 15~(th) International Conference on Luminescence and Optical Spectroscopy of Condensed Matter(ICL'08)

Lyon, France 7 ~11 July 2008http://ICL08.univ-lyon1.frPLACE OF ICL 08Universitde Lyon, UniversitLUMIERE LYON218, Quai Claude Bernard,69007 LYONINTERNATIONAL PROGRAM COMMITTEEGeorges BOULON, France, ChairAndreis MEIJERINK, The Netherlands, Co-ChairGius…